Listen to this — it's the winning entry in a competition to make the most interesting musical track based entirely on sounds made by failing hard drives on Hitachi computers. [Hitachi, it turns out, had posted the various sounds its failing drives make as a troubleshooting guide for users . . .] Seriously. See the description of the contest at the Gizmodo Gadgets weblog. It's quite a lovely little piece of ambient music ...
[and thanks to J. Lewis for pointing me here]

Reminds me of the program that played music on the commodore 64's 1541 floppy disk drive by moving the drive heads into various positions which generated the humming sounds for the music. I believe that song was "Daisy, Daisy...."